➰ eSpring

Hold-frame based spring animations.

Add hold keyframes to a property, call spring(), that's it!.

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✨ View more details on our website: motiondeveloper.com/tools/espring

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• The duration for each animation is set by the spring configuration, so you only need to add one keyframe for each value
• Correctly animate out of in-progress animations
• Use phyically modelled springs to quickly get good looking aniamtions

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🏗 This project was created with create-expression-lib - our utility for creating and managing After Effects .jsx libraries.

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Setup

1. Download the latest version from the releases page.
2. Import it into After Effects

Expression

Usage:

const { eSpring } = footage('eSpring.jsx').sourceData;
eSpring();

Types:

eSpring(options = {
    mass = 1,
    stiffness = 100,
    damping = 10,
    initialVelocity = 0,
    property = thisProperty,
    __fast = false,
  }, time = thisLayer.time): PropertyValueType

Development

1. Clone project locally

   git clone https://github.com/motiondeveloper/eSpring.git
   cd eSpring

2. Start Rollup

   Start Rollup in watch mode to automatically refresh your code as you make changes, by running:

   npm run watch

   You can run also run a once off build: npm run build

3. Edit the src files

   The index.ts contains an example expression setup.

   Any values exported from this file will be included in your library, for example:

   export { someValue };

4. Import the dist file into After Effects

   Use the compiled output file as you would any other .jsx library. Any changes to the src files will be live updated, and After Effects will update the result of your expression.